arrhythmia is a disturbance in the normal rate or rhythm of your heartbeat, caused by abnormalities in the heart's electrical system. Arrhythmias can range from annoying palpitations to life threatening sudden cardiac death risks.
Some arrhythmias may require an implanted device to keep the heart beating in a healthy rhythm. These devices are implanted under the skin, typically below the shoulder, and have wires called leads that deliver electrical energy to the heart. At The Heart Hospital Baylor, we use proven medical expertise to implant the appropriate device designed to manage your arrhythmia effectively. The types of devices we implant include implantable cardiac defibrillators (ICD), cardiac resynchronization therapy (CRT) and pacemakers.
A pacemaker is a small device that's placed in the chest or abdomen to help control abnormal heart rhythms. This device uses electrical pulses to prompt the heart to beat at a normal rate.
Pacemakers are used to treat arrhythmias. A pacemaker can relieve some arrhythmia symptoms, such as fatigue and fainting. A pacemaker also can help a person who has abnormal heart rhythms resume a more active lifestyle.
Faulty electrical signaling in the heart causes arrhythmias. Pacemakers use low-energy electrical pulses to overcome this faulty electrical signaling. Pacemakers can:
Pacemakers also can monitor and record your heart's electrical activity and heart rhythm. Newer pacemakers can monitor your blood temperature, breathing rate, and other factors. They also can adjust your heart rate to changes in your activity.
Pacemakers can be temporary or permanent. Permanent pacemakers are used to control long-term heart rhythm problems. Temporary pacemakers are used to treat short-term heart problems, such as a slow heartbeat that's caused by a heart attack, heart surgery, or an overdose of medicine.
Temporary pacemakers also are used during emergencies. They might be used until your doctor can implant a permanent pacemaker or until a temporary condition goes away. If you have a temporary pacemaker, you'll stay in a hospital as long as the device is in place.
A pacemaker consists of a battery, a computerized generator, and wires with sensors at their tips. The battery powers the generator, and both are surrounded by a thin metal box. The wires connect the generator to the heart.
A pacemaker helps monitor and control your heartbeat. The electrodes detect your heart's electrical activity and send data through the wires to the computer in the generator. If your heart rhythm is abnormal, the computer will direct the generator to send electrical pulses to your heart.
New pacemakers can monitor your blood temperature, breathing, and other factors. They also can adjust your heart rate to changes in your activity.
The pacemaker's computer also records your heart's electrical activity and heart rhythm. Your doctor will use these recordings to adjust your pacemaker so it works better for you.
Pacemakers have one to three wires that are each placed in different chambers of the heart.
The two main types of programming for pacemakers are demand pacing and rate-responsive pacing.
A demand pacemaker monitors your heart rhythm. It only sends electrical pulses to your heart if your heart is beating too slowly or if it misses a beat.
A rate-responsive pacemaker will speed up or slow down your heart rate depending on how active you are. To do this, the device monitors your sinus node rate, breathing, blood temperature, and other factors to determine your activity level.
Your doctor will work with you to decide which type of pacemaker is best for you.
Placing a pacemaker requires minor surgery. The surgery usually is done in a hospital or special heart treatment laboratory.
Your doctor will insert a needle into a large vein, usually near the shoulder opposite your dominant hand. Your doctor will then use the needle to thread the pacemaker wires into the vein and to correctly place them in your heart.
An x-ray "movie" of the wires as they pass through your vein and into your heart will help your doctor place them. Once the wires are in place, your doctor will make a small cut into the skin of your chest or abdomen. They will slip the pacemaker's small metal box through the cut, place it just under your skin, and connect it to the wires that lead to your heart. The box contains the pacemaker's battery and generator.
Once the pacemaker is in place, your doctor will test it to make sure it works properly. The entire surgery takes a few hours.
Pacemaker surgery generally is safe. If problems do occur, they may include:
Talk with your doctor about the benefits and risks of pacemaker surgery.
Source: National Heart, Lung, and Blood Institute; National Institutes of Health; U.S. Department of Health and Human Services
The specialists on the medical staff of Baylor Scott & White The Heart Hospital – Plano lend their experience and many years of technical expertise to your care. Our multidisciplinary program draws from a broad spectrum of specialists including cardiac surgery, interventional cardiology, cardiology, vascular surgery, interventional radiology, and a team of dedicated cardiovascular nursing specialists. This multidisciplinary team works together to provide you with the most appropriate treatment approach to your unique heart or vascular condition.
For a physician referral, call 1.855.922.9567. Referring physicians may call 469.814.3565 to schedule a patient for evaluation.
Physicians are members of the medical staff at one of Baylor Health Care System's subsidiary, community or affiliated medical centers and are neither employees nor agents of those medical centers, Baylor Scott & White The Heart Hospital – Plano or Baylor Health Care System.